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    Marc A. Greenstein, DO

    5.0 (2 reviews)
    Closed 8:00 am - 5:00 pm

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    4 months ago

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    David H Cornell, MD

    David H Cornell, MD

    4.4(11 reviews)
    0.4 mi

    I had my first appointment with Dr. Cornell today. I was actually supposed to have my first…read moreappointment next week but I was in a lot of pain and extremely uncomfortable that Dr. Cornell and the office manager lady Kim went out of their way and accommodated me and brought me in today at last minute. They truly cared about me as a patient and as a person. I moved to Knoxville, TN about 2 months ago for work. I've been seeing my previous urologist in NJ for years for my urological issues. My urological issues are embarrassing to me and it is very difficult for me to find the right person I'm comfortable with for treatment. I couldn't find anyone in Knoxville that could help my specific issue and that I was comfortable with as well. I did some research and I found Dr. Cornell and saw he had lots of experience with my issue and offered the same kind of treatments as my previous doctor. At my appointment today I felt extremely comfortable with Dr. Cornell. I was surprisingly more comfortable with him than my previous urologist I've seen for years. He is very nice and listens well. He offers excellent advice. And his treatment was even better and more effective than my NJ urologist as well. I am doing so much better right now and I'm grateful. I have to drive 3 hours each way to see Dr. Cornell but it is worth it to me. He is now my official urologist and I will be seeing him regularly. I am extremely grateful and relieved that I found him. I highly recommend him to anyone looking for a urologist. Honestly I believe he is the best doctor and this is the best doctor office I've ever been to. Please check him out. He will help you. Thank you Dr. Cornell and Kim. - Christopher Neller

    I was referred to Dr. Cornell by my internist, and I'm so glad I was!…read more I saw Dr. Cornell as a new patient today, and he and his staff could not have been nicer or more efficient. Once I got there and gave his office manager my paperwork, I only had to wait long enough for her to photocopy my license and insurance and start a chart, which took no more than 10 minutes. I was taken back quickly, and waited no more than 10 minutes again to see Dr. Cornell himself. Dr. Cornell was EXTREMELY thorough, and looked over my past history, looking for anything that could help him piece together a picture of what was going on with me; which I really appreciated. He answered every question (even if I accidentally asked more than once), made sure I knew exactly what was going on, and took as much time as I needed to understand his conclusions, course of treatment, and the reasoning behind it. Dr. Cornell listened and made sure he understood exactly what I was saying before coming to any conclusions or making a diagnosis. It was so wonderful to have a doctor that really listened and spent time with me. I cannot say enough about my experience with Dr. Cornell today.

    Georgia Urology - Sandy Springs

    Georgia Urology - Sandy Springs

    1.7(80 reviews)
    0.9 mi

    The physical therapist at this practice is skilled and compassionate, and the clinical care has…read moretruly helped my child. That said, the front office staff for Pediatrics is a different story entirely--and it's the reason I'm leaving a negative review. Every appointment has involved some kind of administrative mess--insurance billed incorrectly, surprise charges, delays, or unclear communication. Even after confirming everything in advance by phone, we often show up only to be told something completely different. During our most recent visit, we were left waiting over half an hour while the front desk staff insisted we had to make a payment before the appointment could proceed--even though there was an urgent medical situation with my other child that we had to handle on-site. It wasn't until I asked for the manager that things shifted, and suddenly, the therapist was available again after a "cancellation." I never did get to speak with the manager directly. This kind of experience shouldn't happen, especially at a pediatric clinic. The front office needs better training, more professionalism, and accountability. Until then, families will continue to struggle through needlessly stressful visits.

    Dr Smith and his nurse Ben are absolutely amazing advocates for my daughter. They involve us in…read moreevery step of the plan of care and go above and beyond to make sure she receives the treatment she needs. Could not recommend a better pediatric team and we are so thankful for them!

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    Georgia Urology - Sandy Springs

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    Advanced Urology - Advanced Urology Marietta Building

    Advanced Urology

    2.1(16 reviews)
    12.7 mi

    I had an extremely concerning experience with Advanced Urology in Marietta, Georgia, specifically…read morerelated to how they handle VA Community Care patients and billing. I was referred to this clinic through VA Community Care for a VA-authorized vasectomy. Shortly after being contacted to schedule, I was told I would need to pay a $250 booking fee out of pocket. As a veteran using authorized Community Care, this immediately raised concern. Only after I pushed back and involved VA Community Care did the clinic reverse that position and acknowledge that the booking fee should be billed to the VA, not the veteran. After the appointment was scheduled, I then received messaging from the clinic stating that the procedure would cost $149 if a post-vasectomy semen analysis kit was included, and $0 if it was excluded. I was repeatedly told by the clinic that this analysis kit is a retail product and that, due to how they operate, the cost is routinely passed to veterans. This directly conflicted with what VA Community Care confirmed in writing. VA Community Care explicitly stated that labs and pathology relevant to the referral are covered, including post-vasectomy semen analysis and post-vasectomy test kits, and instructed the clinic to bill Optum using CPT code 89321. VA also stated that if a veteran paid anything to the provider, those charges must be refunded. I have included screenshots documenting both the VA's written guidance and the clinic's messages quoting out-of-pocket costs. I personally spoke with the director of the clinic's benefits department, who stated that CPT code 89321 does not cover the vasectomy or the analysis kit and that the clinic cannot use that code to bill the kit internally. Despite VA's written clarification, I was told that if I wanted the required post-vasectomy analysis completed, I would need to arrange follow-up separately through the VA. After further confirmation with VA Community Care, I learned that the Atlanta VA does not even perform post-vasectomy semen analysis locally, meaning this proposed alternative was not viable and would have left me without proper follow-up or forced into paying out of pocket later. Because the clinic could not or would not provide VA-authorized care from start to finish, and attempted to shift the burden of their internal billing limitations onto me as the patient, I cancelled my appointment. Veterans should be aware that this clinic appears to accept VA Community Care referrals while disputing or declining covered components of care when they do not align with the clinic's internal billing model. I strongly recommend that any veteran considering this clinic obtain written confirmation in advance that all aspects of care, including required follow-up testing, will be completed and billed appropriately, with no out-of-pocket cost.

    Rude, combative staff. Management doesn't address simple behavioral issues w associates. Definitely…read morenot a place you want to trust to handle your life threatening conditions.

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    Advanced Urology - Advanced Urology Marietta location

    Advanced Urology Marietta location

    Advanced Urology - Clinic text quoting a $149 charge for a post-vasectomy analysis kit on a VA-authorized referral

    Clinic text quoting a $149 charge for a post-vasectomy analysis kit on a VA-authorized referral

    Advanced Urology - VA documentation confirming coverage of post-vasectomy testing that the clinic said was not billable

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    VA documentation confirming coverage of post-vasectomy testing that the clinic said was not billable

    Advanced Urology

    Advanced Urology

    2.7(30 reviews)
    13.4 mi

    I visited this office in November 2025, twice (2nd time for a 2nd round of lab work, which wasn't…read morecheap). I'm still waiting on my prescription as of January 15th. First, they will push whatever the local pharmaceutical rep is selling. Once you find out that's not covered by insurance, they'll send another prescription to the pharmacy. Then they'll take 2-3 weeks to send the authorization, during which time the pharmacy will drop your standing prescription. I have been to the pharmacy multiple times, called the Dr's office multiple times, spoken with my insurance multiple times, and still do not have my prescription after waiting for 2 months. They milk your insurance, push pharma rep preferred name brands (likely with kickbacks), and don't really care how long it takes to get your medication to you. I eventually gave up and will now have to start the process over with another urologist. Save yourself and headache and GO SOMEWHERE ELSE! Quite possibly the worst experience I have had with any medial office.

    After my procedure, I ended up overnight in the ER. The anesthesia was too much, and the stent he…read moreplaced was being rejected. This I knew because Georgia Urology did my procedure seven years ago. So he wanted to put in a new stent, I told him a day before the procedure do not under any circumstances. So he didn't and it's a miracle "all the stones" were removed this time... So I was called in early for the procedure, and prepped immediately to go back, I was so happy. Only to find out the wait was indefinite, about 90 min. The nurses were tired of me asking so they decided to turn up the music at the nurses station, very rude. When I arrived financial acknowledged they felt bad about my night in the ER! As they should but it was nice of her to say. She was the most competent person I dealt with in the entire office. So they remove the stent/stones and I nearly bled to death when the nurse took out the IV. There's a lot of incompetence and greed. The doctor has the knowledge but chooses the most expensive way to remove stones. I feel like this is a pill mill, but for surgical procedures....so they can over charge you and your insurance company. I'm a little guy, but I believe I need to do more than write reviews about this. This is too serious. They are getting away with neglect and bad practices, maybe even more.... If you have had a bad surgical, or billing experience with Advanced Urology, I would like to hear your story! If you haven't, save your time, money and maybe your life by going somewhere else.

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    Advanced Urology
    Advanced Urology
    Advanced Urology

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    Marc A. Greenstein, DO - urologists - Updated May 2026

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